Pr0211

Last updated
Pr0211
Observation data
Epoch J2000        Equinox J2000
Constellation Cancer [1]
Right ascension 08h 42m 11.49887s [2]
Declination +19° 16′ 37.2375″ [2]
Apparent magnitude  (V)12.143 [3]
Characteristics
Evolutionary stage Main sequence [2]
Spectral type K1V [4] or late G [5]
Apparent magnitude  (G)11.926±0.003 [2]
Apparent magnitude  (J)10.660±0.022 [6]
Apparent magnitude  (H)10.242±0.019 [6]
Apparent magnitude  (K)10.173±0.016 [6]
Astrometry
Radial velocity (Rv)35.37±0.42 [2] km/s
Proper motion (μ)RA: −36.820 mas/yr [2]
Dec.: −12.384 mas/yr [2]
Parallax (π)5.4387±0.0184  mas [2]
Distance 600 ± 2  ly
(183.9 ± 0.6  pc)
Details [7]
Mass 0.935±0.013  M☉
Radius 0.827±0.012  R☉
Surface gravity (log g)4.51±0.05  cgs
Temperature 5300±30  K
Metallicity [Fe/H]0.18±0.02  dex
Rotation 7.97 days [3]
Rotational velocity (v sin i)5.1±0.3 km/s
Age 578±12 or 790±30  Myr
Other designations
Pr0211, EPIC 211936827, TIC 175291727, 2MASS J08421149+1916373, NGC 2632 JC 278 [8]
Database references
SIMBAD data
Exoplanet Archive data

Pr0211 (sometimes written Pr 0211, also 2MASS J08421149+1916373) is a Sun-like late G or early K-type main-sequence star in the Beehive Cluster, or Praesepe, located 600 light-years away in the constellation Cancer. It is rotationally variable and has a rotation period of 7.97 days, [3] with its spin axis at an inclination of 76°±11° to the plane of the sky. [7] Pr0211 hosts two known exoplanets, and was the first multi-planet system to be discovered in an open cluster. [5] [7]

Pr0211 forms a double star system with a K-type main-sequence star known as NGC 2632 JC 280 or 2MASS J08421285+1916040. [9] [10] [11] Although the stars share a similar distance and common proper motion, their relative space velocity appears to be high enough that the pair are not gravitationally bound. [9]

Planetary system

Pr0211 b is a gas giant exoplanet, specifically a hot Jupiter, orbiting around Pr0211. Pr0211 b along with Pr0201 b are notable for being the first exoplanets discovered in the Beehive Cluster. [12] [13] Pr0211 b and Pr0201 b were discovered in 2012 by Sam Quinn [12] [13] [5] and his colleagues while observing 53 stars in the Beehive Cluster using the 1.5 metres (4.9  ft ; 1.6  yd ) telescope at the University of Georgia in the United States. [12]

Pr0211 c is a gas giant exoplanet orbiting around Pr0211. [14] Pr0211 c was discovered in 2016 by Luca Malavolta [14] [7] and his colleagues while observing its host star with the HARPS-N spectrograph on the 3.6 metres (12  ft ; 3.9  yd ) Italian Telescopio Nazionale Galileo (TNG) in La Palma, and the Tillinghast Reflector Echelle Spectrograph (TRES) mounted at the 1.5 metres (4.9  ft ; 1.6  yd ) telescope at the University of Georgia in the United States.

The Pr0211 planetary system [7]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b≥1.88±0.03  MJ 0.03176±0.000152.14610±0.000030.011+0.012
−0.008		——
c≥7.79±0.33  MJ 5.5+3.0
−1.4		4850+4560
−1750		0.71±0.11——

References

  1. ↑ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific . 99 (617): 695. Bibcode:1987PASP...99..695R. doi: 10.1086/132034 . Constellation record for this object at VizieR.
  2. 1 2 3 4 5 6 7 8 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv: 2208.00211 . Bibcode:2023A&A...674A...1G. doi: 10.1051/0004-6361/202243940 . S2CID   244398875. Gaia DR3 record for this source at VizieR.
  3. 1 2 3 Kovács, Géza; Hartman, Joel D.; Bakos, Gáspár Á.; Quinn, Samuel N.; Penev, Kaloyan; Latham, David W.; Bhatti, Waqas; Csubry, Zoltán; De Val-Borro, Miguel (2014). "Stellar rotational periods in the planet hosting open cluster Praesepe". Monthly Notices of the Royal Astronomical Society. 442 (3): 2081. arXiv: 1405.3728 . Bibcode:2014MNRAS.442.2081K. doi: 10.1093/mnras/stu946 .
  4. ↑ Allen, Lori E.; Strom, Karen M. (1995). "Moderate-Resolution Spectral Standards from lambda5600 to lambda9000 angstrom". The Astronomical Journal. 109: 1379. Bibcode:1995AJ....109.1379A. doi:10.1086/117370.
  5. 1 2 3 Quinn, Samuel N.; White, Russel J.; Latham, David W.; Buchhave, Lars A.; Cantrell, Justin R.; Dahm, Scott E.; Fűrész, Gabor; Szentgyorgyi, Andrew H.; Geary, John C.; Torres, Guillermo; Bieryla, Allyson; Berlind, Perry; Calkins, Michael C.; Esquerdo, Gilbert A.; Stefanik, Robert P. (2012). "Two 'b's in the Beehive: The Discovery of the First Hot Jupiters in an Open Cluster". The Astrophysical Journal. 756 (2): L33. arXiv: 1207.0818 . Bibcode:2012ApJ...756L..33Q. doi:10.1088/2041-8205/756/2/L33. S2CID   118825401.
  6. 1 2 3 Cutri, R. M.; Skrutskie, M. F.; Van Dyk, S.; Beichman, C. A.; Carpenter, J. M.; Chester, T.; Cambresy, L.; Evans, T.; Fowler, J.; Gizis, J.; Howard, E.; Huchra, J.; Jarrett, T.; Kopan, E. L.; Kirkpatrick, J. D.; Light, R. M.; Marsh, K. A.; McCallon, H.; Schneider, S.; Stiening, R.; Sykes, M.; Weinberg, M.; Wheaton, W. A.; Wheelock, S.; Zacarias, N. (2003). "VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)". Vizier Online Data Catalog. Bibcode:2003yCat.2246....0C.
  7. 1 2 3 4 5 Malavolta, L.; et al. (2016), "The GAPS programme with HARPS-N at TNG. XI. Pr 0211 in M 44: the first multi-planet system in an open cluster", Astronomy & Astrophysics, 588: A118, arXiv: 1602.00009 , Bibcode:2016A&A...588A.118M, doi:10.1051/0004-6361/201527933, S2CID   119207951
  8. ↑ "Cl* NGC 2632 JC 278". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 9 December 2023.
  9. 1 2 Mugrauer, M. (December 2019). "Search for stellar companions of exoplanet host stars by exploring the second ESA-Gaia data release". Monthly Notices of the Royal Astronomical Society . 490 (4): 5088–5102. Bibcode:2019MNRAS.490.5088M. doi: 10.1093/mnras/stz2673 .
  10. ↑ "Pr0211". NASA Exoplanet Archive . Retrieved 9 December 2023.
  11. ↑ "Cl* NGC 2632 JC 280". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 9 December 2023.
  12. 1 2 3 Fazekas, Andrew (2012-09-21). "New Planets Found in Star Cluster - Would Have Dazzling Nights". National Geographic News. NATIONAL GEOGRAPHIC. Archived from the original on September 23, 2012. Retrieved 2016-05-30.
  13. 1 2 "Planet Pr 0211 b". Extrasolar Planets Encyclopaedia . Retrieved 2016-04-18.
  14. 1 2 "Planet Pr 0211 c". Extrasolar Planets Encyclopaedia . Retrieved 2016-04-18.
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